Skip to main content

Summer in Greenland: Image of the Day

Item Preview

image
Summer in Greenland: Image of the Day


Published 2008


Ranging in color from snow white to turquoise, sea ice lined the shoreline in eastern Greenland in mid-June 2000. NASA's Landsat 7 satellite acquired this image on June 16, 2000, shortly before the summer solstice when the Arctic enjoyed near round-the-clock sunshine.

Although snow and ice abound in this image, both are in retreat for the summer. Snowcaps form dendritic patterns on the brown landscape, leaving south-facing slopes especially bare. Around the Hold with Hope promontory, clings to the shoreline. Common over shallow ocean waters along shorelines, fast ice holds fast to the shore and/or sea bottom, not moving with winds or currents. Off the coast, pieces of bright white sea ice float on the sea surface, able to move with forces that don's affect the fast ice.

Much of the fast ice in this image is blue, especially in the fjord north of Hold with Hope. Summer melt often lends ice a blue color due to water saturation. In addition, this ice could be what is known as or ice composed of large crystals. Light that is visible to human eyes is composed of three basic components: red, green, and blue. Pure ice absorbs a miniscule amount of red light, reflecting slightly more green and blue light. This red-light absorption is lost in the noise of tiny snow crystals--the same way a piece of colored hard candy might appear white if it were pulverized. Large ice crystals make the red-light absorption visible to human eyes--just as sufficiently large pieces of glass would show a very subtle tint.

The relentless action of wind can transform snow crystals to large ice crystals. Away from the coast, snakes of ice make their way through inland fjords, and some of this ice is also blue.

NASA image created by Jesse Allen, using Landsat data provided by the www.usgs.gov/ United States Geological Survey. Caption by Michon Scott, based on image interpretation by Ted Scambos, National Snow and Ice Data Center.



Identifier greenland_etm_2000168
Filename greenland_etm_2000168_lrg.jpg
Creator NASA -- NASA Image Of The Day
Date 2008
Mediatype image
Rights Public Domain
Source http://earthobservatory.nasa.gov/IOTD/view.php?id=8854
Year 2008
Publicdate 2011-08-02 12:03:24
Addeddate 2011-08-02 12:03:24
Backup_location ia903702_7
Language English

comment
Reviews

There are no reviews yet. Be the first one to write a review.
SIMILAR ITEMS (based on metadata)
eye
Title
Date Archived
Creator
NASA Images
by NASA -- NASA Image Of The Day
image
eye 42
favorite 0
comment 0
Source: http://earthobservatory.nasa.gov/IOTD/view.php?id=8291
NASA Images
by NASA -- NASA Image Of The Day
image
eye 58
favorite 0
comment 0
Source: http://earthobservatory.nasa.gov/IOTD/view.php?id=8777
NASA Images
by NASA -- NASA Image Of The Day
image
eye 47
favorite 0
comment 0
Source: http://earthobservatory.nasa.gov/IOTD/view.php?id=8472
NASA Images
by NASA -- NASA Image Of The Day
image
eye 38
favorite 0
comment 0
Source: http://earthobservatory.nasa.gov/IOTD/view.php?id=8696
NASA Images
by NASA -- NASA images created by Jesse Allen, using data provided courtesy of Laura Rocchio, Landsat Project Science Office.
image
eye 35
favorite 0
comment 0
Source: http://earthobservatory.nasa.gov/IOTD/view.php?id=7738
NASA Images
by NASA -- NASA Image Of The Day
image
eye 43
favorite 0
comment 0
Source: http://earthobservatory.nasa.gov/IOTD/view.php?id=8842
NASA Images
by NASA -- Image from the MODIS Mosaic of Antarctica collection, provided by the nsidc.org/data/moa/index.html National Snow and Ice Data Center.
image
eye 27
favorite 0
comment 0
Source: http://earthobservatory.nasa.gov/IOTD/view.php?id=7620
NASA Images
by NASA -- Image by Jesse Allen, made from the Landsat Image Mosaic of Antarctica ( lima.usgs.gov/ LIMA )
image
eye 55
favorite 0
comment 0
Source: http://earthobservatory.nasa.gov/IOTD/view.php?id=7544
NASA Images
by NASA -- NASA Image Of The Day
image
eye 402
favorite 0
comment 0
Source: http://earthobservatory.nasa.gov/IOTD/view.php?id=8360
NASA Images
by NASA -- NASA Image Of The Day
image
eye 28
favorite 0
comment 0
Source: http://earthobservatory.nasa.gov/IOTD/view.php?id=8588